Hino Tomohito, Furumatsu Takayuki, Fujii Masataka, Kodama Yuya, Miyazawa Shinichi, Kamatsuki Yusuke, Yamada Kazuki, Ozaki Toshifumi
Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama 700-8558, Japan.
Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama 700-8558, Japan.
J Orthop Sci. 2017 Nov;22(6):1084-1088. doi: 10.1016/j.jos.2017.07.011. Epub 2017 Aug 18.
To compare the plain knee radiograph finding of tibial eminence width between knees with complete discoid lateral meniscus, incomplete discoid lateral meniscus, and normal lateral meniscus.
The study included 27 knees with discoid lateral meniscus, including 13 knees with complete discoid lateral meniscus and 14 knees with incomplete discoid lateral meniscus. A control group of 14 knees with normal lateral meniscus was also included. Tibial eminence width and the lateral slope angle of the medial tibial eminence were assessed using plain frontal knee radiographs. Individual differences in knee size were corrected by dividing tibial eminence width by tibial width to obtain the tibial eminence width percentage.
Mean tibial eminence width and tibial eminence width percentage in the complete discoid lateral meniscus group was significant larger than other groups. Mean lateral slope angle in the complete discoid lateral meniscus group was significantly smaller than other groups. A tibial eminence width cut-off of 13.9 mm showed a sensitivity and specificity of 100% and 83%, respectively. A tibial eminence width percentage cut-off of 18.8% showed a sensitivity and specificity of 100% and 90%, respectively. A lateral slope angle cut-off of 27.1° showed a sensitivity and specificity of 71% and 83%, respectively.
There were clear differences in tibial eminence width, tibial eminence width percentage, and lateral slope angle between the complete discoid lateral meniscus group and the other groups. The plain radiographic parameters identified by this study could be useful for complete discoid lateral meniscus screening.
Clinical.
比较完全盘状外侧半月板、不完全盘状外侧半月板和正常外侧半月板的膝关节胫骨髁间嵴宽度的X线平片表现。
本研究纳入27例外侧盘状半月板膝关节，其中13例为完全盘状外侧半月板，14例为不完全盘状外侧半月板。还纳入了14例外侧半月板正常的膝关节作为对照组。采用膝关节正位X线平片评估胫骨髁间嵴宽度和胫骨内侧髁间嵴的外侧倾斜角。通过将胫骨髁间嵴宽度除以胫骨宽度来校正膝关节大小的个体差异，以获得胫骨髁间嵴宽度百分比。
完全盘状外侧半月板组的平均胫骨髁间嵴宽度和胫骨髁间嵴宽度百分比显著大于其他组。完全盘状外侧半月板组的平均外侧倾斜角显著小于其他组。胫骨髁间嵴宽度截断值为13.9mm时，敏感性和特异性分别为100%和83%。胫骨髁间嵴宽度百分比截断值为18.8%时，敏感性和特异性分别为100%和90%。外侧倾斜角截断值为27.1°时，敏感性和特异性分别为71%和83%。
完全盘状外侧半月板组与其他组在胫骨髁间嵴宽度、胫骨髁间嵴宽度百分比和外侧倾斜角方面存在明显差异。本研究确定的X线平片参数可用于完全盘状外侧半月板的筛查。
临床研究。
